Epidermal cyst; Keratin cyst; Epidermoid cyst
The main symptom is usually a small, non-painful lump beneath the skin.
If the lump becomes infected or inflammed, other symptoms may include:
- Skin redness
- Tender or sore skin
- Warm skin in the affected area
Grayish-white, cheesy, foul-smelling material may drain from the cyst.
Signs and tests
In most cases, your doctor can diagnose this type of cyst by simply examining your skin. Occasionally, a biopsy may be needed to rule out other conditions.